Black Friday STEM Kits 2026: KiwiCo, Thames & Kosmos, Snap Circuits and Subscription Boxes, What Tends to Drop

STEM kits split into two kinds of Black Friday purchase. Subscription boxes such as KiwiCo, CrunchLabs, MEL Science and Little Passports are sold by the maker, so their offers take the form of a cheap first box or free crates on a prepaid plan, and the price returns to normal when the plan renews. Boxed kits from Thames & Kosmos, Elenco’s Snap Circuits, Engino, Osmo and KiwiCo’s own store sit on retailer shelves, so they get the flat percentage cuts that Target, Walmart and Amazon run in November.

We compared the makers’ plan pages, the retailers’ holiday releases and dated deal-site reports of the 2025 offers for the 36 STEM kits and subscriptions in ToyNoble’s reviews, and have not built these kits ourselves. Everything here was checked on Oct 31, 2026, and we’ll update this guide as retailers publish their ads. Our Black Friday toy deals 2026 guide has the week-by-week plan and the real-discount test.

What have the makers and retailers published for Black Friday 2026 so far?

As of Oct 31, 2026, the big retailers have dates and no STEM-specific deals, and no STEM maker has posted a Black Friday offer. The dates below come from Target’s Oct 21, 2026 release, Walmart’s Oct 26, 2026 release, which also has stores opening at 6 am on Nov 27, and Amazon’s own FAQ dated Oct 30, 2026, which confirms Nov 27 and Nov 30 but gives no event window; Amazon’s 2025 event ran from Nov 20 to Dec 1.

KiwiCo’s email offer and CrunchLabs’ annual saving are everyday baselines, so a November deal has to beat them to be worth waiting for.

How do STEM subscription boxes discount on Black Friday?

Subscription makers rarely cut the ongoing monthly price. Their offers come in three shapes: a cheap or free first box on a month-to-month plan, free crates added to a prepaid 3-, 6- or 12-month plan, and a percentage off single kits in the maker’s store. All three are built so that the subscription renews at the regular rate. Promo codes are left out of the table on purpose.

Two patterns stand out. KiwiCo’s offer got better between Black Friday and Cyber Monday in 2025, from a $15 first crate to a $10 one, and from “up to 4 free crates” to a flat $20 a crate on long plans. CrunchLabs’ Cyber Monday offer, 2 months free on an annual prepay, is the same saving its Build Box plan page showed on Oct 31, 2026, where the annual prepaid price of $27.45 a box is labeled a $66 saving, “about 2 free months.”

The 2023 KiwiCo offer had a different shape: $15.95 a month on a 3-month-or-longer plan against a regular $23.95, which Reviewed reported on Nov 20, 2023 as 33% off, a cut to the ongoing rate that 2025 did not repeat. Our comparison of KiwiCo, CrunchLabs and MEL Science covers what arrives in each box.

How do gift subscriptions work, and what are the holiday cutoffs?

KiwiCo’s holiday shipping FAQ describes a “Subscription starts” dropdown at checkout where you pick the start month, plus an option to “ship the first crate to you to give the gift in person,” with crate two onward going to the recipient. Its blog post from Nov 22, 2021 describes the same two options, so this is a settled feature, not a seasonal one.

Little Passports’ holiday FAQ offers a “Shipments Start” dropdown with a December or January start, a printable gift card you can download at once, a gift message in the first shipment, and an optional parent’s email for tracking.

CrunchLabs sells gift certificates and lets you add expedited shipping to the first box only, $29.95 in the US, per its plan page on Oct 31, 2026. MEL Science’s gift page sells 6- or 12-month prepaid gift plans “with no renewals or hidden commitments,” and its FAQ says the recipient can pause a gift subscription but cannot cancel it. KiwiCo, CrunchLabs and Little Passports plans all renew automatically unless turned off.

Neither cutoff page states a year, and both carried 2026 copyright lines when we read them, so treat the dates as this season’s and check again in December. If you miss a cutoff, every maker here sells a gift card delivered by email; KiwiCo’s arrive right after purchase.

Which KiwiCo kits and crates are worth watching?

KiwiCo has two Black Friday paths. Its three subscription lines we review are sold only by KiwiCo, so their offers follow the pattern above; its nine single kits are sold by KiwiCo and by retailers, so they can drop either way. KiwiCo’s plan pages show prices only after you enter a child’s name, so the subscription prices below are from our review pages, checked Oct 5 and 6, 2026.

Table note: every “30% would be” figure and the plan arithmetic in this guide are ours, not announced prices; 30% was the common retailer cut on toy lines in the 2025 sales our first Black Friday article documented.

STEM kits

KiwiCo Kiwi Crate

Best for: Kids aged 6–9 who like making things

Researched

$24

STEM · 7+

KiwiCo Marble Roller Coaster

Best for: Builders aged 7+ who like marble runs

Researched

$49.95

STEM · 9+

KiwiCo Chain Reaction Workshop

Best for: Kids 9+ who love Rube Goldberg machines

Researched

$69.95

On the Kiwi Crate 12-month plan at $288, four free crates would be worth $96 at the $24 plan rate, and the Cyber Monday rate of $20 a crate comes to $240, a $48 saving; a $15 first crate saves $15 once, then the plan renews at $30. For a year’s subscription the long-plan offer was the better 2025 deal; for a trial, take the first-crate offer and set a reminder to cancel.

KiwiCo’s store took up to 30% off single kits in both 2025 events, the figure retailers tend to use, so stock and shipping decide where you buy; the three kits at $29.95 and under sell through in December.

Which CrunchLabs, MEL Science and Little Passports plans make sense as gifts?

These three are subscription-only, so the question is which plan, not which store. CrunchLabs’ pages on Oct 31, 2026 priced Build Box at $32.95 a box quarterly and Hack Pack, which ships six robots a year, one every two months, at $72.95 paid every two months or $79.95 semiannually. Both renew annually, and renewal can be turned off up to three days before rebilling.

MEL Chemistry is the one where the gift plan changes the decision: the regular monthly and annual plans renew, the 6- and 12-month gift plans do not, and the 12-months-for-the-price-of-8 annual rate is on the site year-round. MEL lists the subject for ages 10 and up and says experiments need adult supervision, worth telling the parent.

Little Passports World Adventures is the one to time. Its 2025 Cyber Monday offer of 40% off was the deepest here, and the mid-December follow-up was 35%; at $300 for a 12-month plan on our review page, 40% is $120. The plan page showed “starting at $25/mo” on Oct 31, 2026, which matches the 12-month rate on our page, while the monthly rate we recorded was $32. If 2025 repeats, Nov 30 is the day, and the Dec 15 subscription cutoff still leaves two weeks.

Subscription · 8–13

CrunchLabs Build Box

Best for: Young engineers aged 8 to 13 who like Mark Rober

Researched

$29.95

Subscription · 10+

MEL Science MEL Chemistry Subscription

Best for: Kids aged 10+ who want hands-on chemistry

Researched

$29.90

Subscription · 6–10

Little Passports World Adventures

Best for: Kids aged 6 to 10 curious about other countries

Researched

$32

Which boxed kits tend to be retailer sale candidates?

Thames & Kosmos, Elenco, Engino and KiwiCo’s single kits are stocked by Target, Walmart and Amazon, which discount by category in November; in the 2025 toy sales, building and STEM kits got flat percentage cuts rather than bundles or points. The maker stores are where you confirm list price and stock.

Thames & Kosmos’ Last Chance Sale held 48 items on Oct 31, 2026, Chem C2000 at $149.95 and Ubongo 3D at $34.95 among them, but none showed a struck-through regular price, so it reads as clearance; neither it nor Elenco’s store carried a Black Friday banner.

Osmo is the exception that runs its own markdowns: on Oct 31, 2026, playosmo.com showed the Coding Starter Kit for iPad at $89.99, marked down from $99.99, with similar cuts on its Genius and Little Genius kits. Our Osmo Coding Starter Kit review recorded $49.99, down from $59.99, on the same site on Oct 6, 2026, so the kit on sale today may be a different bundle; compare the game list first.

Carry the maker’s list price into any retailer page: a “was” price above the figure on our review page means the discount is smaller than it looks. On Amazon, where most STEM kit searches end up, a coupon checkbox often sits on top of a reduced price, and the two together are what you compare with list; Amazon’s Black Friday FAQ describes price-history tools that show up to a year of prices on a product page.

The 15 Thames & Kosmos kits in ToyNoble’s STEM kit reviews span $17.95 to $249.95, and the Snap Circuits, Engino and Osmo kits fill in electronics, mechanics and coding. Our Thames & Kosmos by age guide sorts the same kits by who they suit; here they are sorted by price, because that decides whether waiting is worth it.

STEM · 10+

Thames & Kosmos Chem C1000 V 2.1 640119

Best for: Kids aged 10+ ready for real lab chemistry

Researched

$59.95

STEM · 8+

Snap Circuits Classic SC-300

Best for: Kids aged 8+ who want a long-running circuits kit

Researched

$98.99

STEM · 10+

Thames & Kosmos Hydraulic Boxing Bots

Best for: Kids 10+ who want a build that ends in a match

Researched

$49.95

A 30% cut is worth real money on the CHEM C2000 ($45), the Renewable Energy Lab ($75) and Snap Circuits Classic ($30), kits an 11-year-old keeps using for a year, so waiting until Nov 27 costs little. The $35 to $60 middle, Ooze Labs through Physics Workshop, is where Thames & Kosmos kits most often show up in retailer sales; buy the first time a price lands near the 30% column.

A box can sell out by Dec 18 and push you to third-party sellers above list, so take the first good price on boxes.

Before any hurried purchase, check what is not in the box: the Chem sets need a 9-volt battery, the Kids First Robot Factory and Snap Circuits Junior two AAs, Snap Circuits Classic four, the Coding Chameleon four AAAs, and the Osmo kit a compatible iPad that nobody is discounting. CHEM C2000 includes an alcohol burner, and both Chem sets are heavy boxes to order early.

Read the maker’s age label on the box rather than the shelf tag, and if the box is older clearance stock, run the product name through the recall database; our guide to reading toy warnings and checking recalls walks through both. How to choose a STEM kit covers picking by age and skill.

FAQs

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